31313103203 has 4 divisors (see below), whose sum is σ = 31319275920. Its totient is φ = 31306930488.

The previous prime is 31313103167. The next prime is 31313103247. The reversal of 31313103203 is 30230131313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30230131313 = 59 ⋅512375107.

It is a cyclic number.

It is not a de Polignac number, because 31313103203 - 2¹⁶ = 31313037667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31313109203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3078743 + ... + 3088896.

It is an arithmetic number, because the mean of its divisors is an integer number (7829818980).

Almost surely, 2^31313103203 is an apocalyptic number.

31313103203 is a deficient number, since it is larger than the sum of its proper divisors (6172717).

31313103203 is an equidigital number, since it uses as much as digits as its factorization.

31313103203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6172716.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 31313103203 its reverse (30230131313), we get a palindrome (61543234516).

The spelling of 31313103203 in words is "thirty-one billion, three hundred thirteen million, one hundred three thousand, two hundred three".